Looking for ideas on how to mark and separate springs to keep in those tackle box sorters.

I use the small clear plastic zip close bags, like the ones parts come in from CGW......or similar to ones jewelry come in......label it with a Sharpie and put it in the bin. Not sure if there is any other way to do it

Others may have better ideas but, I would use a very light coat on one side of the spring..of a flat spray paint specifically made for metal. The colors listed at CGW look like what I described above. CGW recoil springs just barely show the colors, but serve the purpose very well. An inexpensive spray paint brand should work fine.

If this sounds good, go to the CGW website and look at recoil and hammer springs. The colors are there to be matched.